Photos of the Week: Steam Train, Sheep Parade, Golden Rock

A sailing festival in the Persian Gulf, early preparations for Kumbh Mela in India, a vintage-plane crash in California, a German castle overlooking the Rhine, a terrible train accident in Taiwan, Central American immigrants head toward the U.S. border in Mexico, the Invictus Games under way in Australia, President Donald Trump campaigns for Ted Cruz in Texas, pumpkins for gorillas in the London Zoo, and much more.